Minor Code and Compatibility Issues

Hi,

couldn’t find a Github repo, so posting this here:

1. main plugin file is missing an output escaping on line105:

echo '[superblockslider id="' . $post_id . '"]';

2. Missing function prefix for

• classic_editor_error_notice
• is_block_editor_active
• load_shortcode_frontend_scripts

3. Plugin is not fully compatible with the picture-tag mode of Imagify
https://imagify.io/documentation/how-to-check-if-webp-image-is-displayed-on-your-site/
-> In this mode, images are wrapped in a <picture> tag.

Regards